How do the notifications go from theatre Manager to the staff member, volunteer or patron in the database?
The .ics file iCalendar is a computer file format which allows Internet users to send meeting requests and tasks to other Internet users, via email, or sharing files with an extension of .ics. Recipients of the iCalendar data file (with supporting software, such as an email client or calendar application) can respond to the sender easily or counter propose another meeting date/time. iCalendar is used and supported by a large number of products, including Apple iCal® and by Microsoft Outlook®.